20021201
Input Example:
Syntax 1 (list format)
TwoSampleZInt 0.95,1,1.5,list1,list2,1,1
Syntax 2 (parameter format)
TwoSampleZInt 0.95,1,1.5,418,40,402,50
Calculation Result Output
Left :
interval lower limit (left edge)
Right : interval upper limit (right edge)
o
1
:
mean of sample 1 data
o
2
:
mean of sample 2 data
x
1
σ
n
-1
: standard deviation of sample 1 (Displayed only for list format.)
x
2
σ
n
-1
: standard deviation of sample 2 (Displayed only for list format.)
n
1
:
size of sample 1
n
2
:
size of sample 2
1-Prop
Z
Interval
Command:
OnePropZ Int
䡺
Description:
This command obtains the confidence interval of the proportion of successes
in a population.
The confidence interval is obtained using the following expressions.
The confidence level is 100 (1 –
α
)%.
Left
=
–
Z
α
2
Right
=
+
Z
x
n
n
1
n
x
n
x
1
–
x
n
α
2
n
1
n
x
n
x
1
–
n
: sample size
x
: data
Command Syntax
C-Level value,
x
value,
n
value
Definition of Terms
C-Level: confidence level (0
<
C-Level < 1)
x
:
data (0 or positive integer)
n
:
sample size (positive integer)
Input Example:
OnePropZInt 0.95,600,800
Calculation Result Output
Left :
interval lower limit (left edge)
Right : interval upper limit (right edge)
ˆp
:
estimated sample proportion
n
:
sample size
7-10-4
Confidence Intervals
